Over the past 35 years, wine growers across Lodi, California, have used barn owls to control rodents. Now, professors and students at Cal Poly Humboldt are utilizing GPS trackers and the more than 170 owl boxes throughout Lodi to study their daily life and effects on vineyards. "The more we can use natural predators like ours to control things in the vineyard, the better off the whole ecosystem would be, the better the quality of the grapes will be, the better the wine will be, and the better of